.user-container {
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  .u-header {
    padding: 4% 3%;
  }
  .u-header-bottom {
    padding: 4% 3% 8%;
  }
  .u-title {
    font-size: 1.1em;
    vertical-align: middle;
  }
  .u-notice {
    padding: 0 1.5em;
  }
  .u-message {
    margin: 1.5em;
  }
  .u-input-a {
    padding: 3em 1.5em 0;
  }
  .u-input-b {
    padding: 1.5em 1.5em 0;
  }
  .u-input-c {
    clear: both;
    display: flex;
    position: relative;
    justify-content: space-around;
  }
  .u-button-a {
    margin: 3em 1.5em;
  }
  .u-button-a-z {
    margin: 0 1.5em;
  }
  .u-button-a-z-t {
    margin: 1.5em;
  }
  .u-button-b {
    margin: 0.6em 0;
  }
  .u-phone {
    color: #999;
  }
  .fake-input {
    width: 110%;
    height: 120%;
    color: transparent;
    position: absolute;
    top: 0;
    left: -10%;
    outline: none;
    border: none;
  }
  .u-number {
    width: 3em;
    height: 3em;
    line-height: 3em;
    position: relative;
    text-align: center;
    border-bottom: 0.15em solid #ccc;
  }
  .u-line {
    width: 0em;
    position: absolute;
    left: 0;
    bottom: -0.15em;
    height: 0.15em;
    background: black;
    transition: width 200ms ease-out;
    -webkit-transition: width 200ms ease-out;
    -moz-transition: width 200ms ease-out;
    -ms-transition: width 200ms ease-out;
    -o-transition: width 200ms ease-out;
  }
  .u-line.active {
    width: 3em;
  }
}
